Improvement in lamps



C. W. CAHOON.

I Lamp. No 33,825.- Patented Dec. 3. 1861.

run /102v UNITED STATES PATENT OFFICE.

CHARLES XV. OAHOON, OF PORTLAND, MAINE.

IMPROVEMENT IN LAM PS.

Specification forming part of Letters Patent No. 33,825, dated December3, 1861.

To all whom it may concern.-

Be it known that I, CHARLES W. OAHOON, of Portland, in the county ofCumberland and State of Maine, have invented certain new and usefulImprovements in Lamps; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe annexed drawings, making'a part of this specification, in whichFigure 1 represents a top view of the lever of the lamp. Fig. 2represents a vertical section of the lamp. Fig. 3 represents a top viewof the lamp-top. Fig.4 represents a side elevation of the lamp.

Similar letters of reference indicate corre sponding parts in all thefigures.

This invention consists in improvements upon the lamp for which LettersPatent were granted to me February 19, 1861, the first part of which hasreference to the form of the lever for raising the chimney, and itsobject is to make the lever serve also the purposes of a deflector.

To this end the first part of my invention consists in making thatportion of the lever on which the chimney rests in the form of a fiatplate, or nearly so,having a circular hole in the central portion of itfor the flame to pass through.

The object of the second part of my invention is to make the lighting ofthe lamp more convenient when a lever is used and an airchamber. Thispart of my invention consists in attaching to the lever the air-chamber,so that it will be moved with the lever. In the lamp described inLetters Patent granted to 'me February 19, 1861, it was necessary toraise the wick above its normal height in order to light it; but byhaving the deflector and airchamber attached to the lever and movablewith it, it is not necessary thus to raise it, which is a greatconvenience in lighting one lamp from another.

The object of the third part of my invention is to prevent the wind fromcausing the lamp to smoke when carried about, when a lamp with a leveran d an air-chamber attached thereto is used. This part of my inventionconsists in attaching to the lever outside of the air-chamber, and at asuitable distance from it to allow the air to pass between it and theair-chamber, a tubular screen.

The object of the fourth part of my invention is to prevent in a measurethe flame from smoking when the lever is raised for the purpose oflighting other lamps. This part of my invention consists in placing aflat ring of sheet metal just above the top of the wicktube andcombining the same with a lever for raising the chimney.

The object of the fifth part of my invention is to afford a convenientmeans for raising a round solid wick when a lamp with a lever forlifting the chimney is used. This part of my invention consists in usingabar having a stop near that end of it which goes into the wick, overwhich stop is placed a cap attached to the wick-tube and the lamp-top,which has a hole in the outer side of it too small for the stop to getthrough, yet of sufficient size for the bar to play in easily.Consequently the bar can be moved into or out of the wick and yet beretained in near and convenient proximity thereto.

The object of the sixth part of my invention is to connect with anadjustable fulcrum for holding the lever which raises the chimney ahandle, so that in case of breakage of the lamp both the fulcrum andwhatever is attached thereto with the handle can be transferred at onceto another lamp. This part of my invention consists in attaching to anadjustable fulcrum a piece of metal conveniently formed, which reachesdownward from the fulcrum so that it can be easily held by one of thefingers of the hand.

A represents the lever to which the chimney is fastened, and by which itis raised or lowered. It is made of sheet metal, and is pivoted to anadjustable fulcrum K, which fulcrum is fastened by means of a screw tothe collar of a lamp m.

B represents that part of the lever which is extended to form thedeflector, and is in the form of a broad flat plate having a circularhole C in the central portion of it for the flame to issue.

D represents the air-chamber, which is made of sheet metal, and isattached to the lever by means of solder. It is conical in form, and isperforated for the air to pass through, its sides being open at itslower end so that it will go over the wick-tube.

E is a sheet-metal tube without perforations,

and is used for an air-screen. It is attached to the lever by means ofsolder just outside of the air-chamber D. It is open at the lower end,and being in the form of a straight tube, while the air-chamber is inthe form of a cone, space is left between it and the airchamber for theair to enter the latter. Both the air-chamber and screen may beattachedto the lever instead of being soldered thereto by means of thin stripsof sheet metal made in the form of hooks which may be riveted to them,allowing the hooks to go over the top of the lever, or holes may be madein both screen and air-chamber, and either straight pieces of wire orthin strips of metal may be inserted into these holes and-bent in theform of a hook to hold the air-chamber and screen and then bent over thetop of the lever.

f represents the wick-tube of the lam p, which is round.

G is a flat ring made of sheet metal, having two standards, which areattached to the lamptop by means of solder, and is in such a positionthat its flat sides are parallel to the top of the wick-tube. This ringis a little larger than the wick-tube and is situated a little distanceabove it.

H is a bar for moving the wick. It has a stop I near that end of itwhich goes into the wick.

J is a cap which incloses that part of the bar H on which is the stop,and which holds the bar by means of the stop in close proximity to thewick, but yet allows it to be moved into or out of the wick. This capisattached by means of solder partly to the wick-tube, serving to coverthe slot through which the bar I-I enters the wick, and partly to thelamptop, having a hole in its outer side for the bar H to move in, whichis too small for the stop on the bar to be got out of. The bar I1 ismade of wire, and the stop- I is formed by making a short turn or loopin the wire, so that its two shanks will be longitudinally opposite.

K is an adjustable fulcrum, made of two pieces of sheet metal, which arecurved in a circular form, so as to fit the collar of the lamp, and alsocurved upward to meet the lever. They are held together by means ofriv'- ets, and are fastened to thecollar of the lamp by means of ascrew.

L is a piece of metal inserted between the two pieces forming theadjustable fulcrum and fastened thereto by rivets. It is curved downwardfrom the fulcrum, and is intended for a handle to the lamp.

m is the body of the lamp, which is made of glass.

0?. is the glass chimney, and is fastened to the lever A by means of thetwo lips 0 o and the screw 19.

Having thus described my invention, I would further remark that theobject of having the deflector in the form of a broad flat plate, ornearly so, is that air may be retained in a measure in contact with ahighly-heated surface before it reaches the flame, becoming itselfhighly heated, and thus producing a more rapid and perfect combustionthan by the steep conical deflectors generally in use, when a small wickis used and a small light is desired from oils rich in carbon.

I claim 1. A lever with chimney-fastenings, having that part of it onwhich the chimney rests extended so as to form a deflector,substantially as described.

2. The combination of the lever A with the air-chamber D, when theair-chamber is attached to the lever and is movable with it,substantially as described.

3. In combination with a lever for raising the chimney, the air-chamberD and screen E, arranged substantially as described.

4. The ring G, in combination with the lever A, substantially asdescribed.

5. The bar H, having a stop I, in combination with the cap J and leverA,substantially as described.

6. The handle L, in combination with the adjustable fulcrum K and thelever A, substantially as described.

CHARLES T. CAHOON.

Witnesses:

JAMES B. OAHooN, FRANK J. BAILEY.

